#pragma once

#include <iostream>
#include <string>
#include <sstream>
#include <memory>
#include <jsoncpp/json/json.h>

const std::string Sep = "\r\n"; //分隔符

//添加分隔符和长度
bool Encode(std::string &message)
{
    if(message.size() == 0) return false;
    std::string package = std::to_string(message.size()) + Sep + message + Sep;
    message = package;
    return true;
}

bool Decode(std::string &package, std::string *content)
{
    auto pos = package.find(Sep);
    if(pos == std::string::npos) return false;
    std::string content_length_str = package.substr(0, pos);
    int content_length = std::stoi(content_length_str);
    int full_length = content_length_str.size() + content_length + Sep.size() * 2;
    if(package.size() < full_length)
        return false;
    *content = package.substr(pos + Sep.size(), content_length);

    package.erase(0, full_length);
    return true;
}


//获取要计算的数值, 序列化, 反序列化
class Request
{
public:
    Request() :_x(0),_y(0),_oper(0){} 
    Request(int x, int y, char oper)
    : _x(x)
    , _y(y)
    , _oper(oper)
    {}
    //序列化, 使用json, 会用就行, 输出型参数
    bool Serialize(std::string &out_string)
    {
        Json::Value root;
        root["x"] = _x;
        root["y"] = _y;
        root["oper"] = _oper;

        Json::StreamWriterBuilder wb;
        std::unique_ptr<Json::StreamWriter> w(wb.newStreamWriter());
        std::stringstream ss;
        w->write(root, &ss);
        out_string = ss.str();
        return true;
    }
    //反序列化
    bool Deserialize(std::string &in_string)
    {
        Json::Value root;
        Json::Reader reader;
        bool parsingSuccessful = reader.parse(in_string, root);
        if(!parsingSuccessful)
        {
            std::cout << "Failed to parse JSON: " << reader.getFormattedErrorMessages() << std::endl;
            return false;
        }
        _x = root["x"].asInt();
        _y = root["y"].asInt();
        _oper = root["oper"].asInt();
        return true;
    }

    void Print()
    {
        std::cout << _x << std::endl;
        std::cout << _oper << std::endl;
        std::cout << _y << std::endl;
    }
    int X() const {return _x; }
    int Y() const {return _y; }
    char Oper() const {return _oper; }

private:
    //客户端和服务器定义同一种数据类型, 制定同一种协议
    int _x;
    int _y;
    char _oper; //运算符
};


//结果也需要进行序列化和反序列化
class Response
{
public:
    Response() : _result(0), _code(0){}
    Response(int result, int code)
    : _result(result)
    , _code(code)
    {}

    bool Serialize(std::string &out_string)
    {
        Json::Value root;
        root["result"] = _result;
        root["code"] = _code;

        Json::StreamWriterBuilder wb;
        std::unique_ptr<Json::StreamWriter> w(wb.newStreamWriter());
        std::stringstream ss;
        w->write(root, &ss);
        out_string = ss.str();
        return true;
    }
    //反序列化
    bool DeSerialize(std::string &in_string)
    {
        Json::Value root;
        Json::Reader reader;
        bool parsingSuccessful = reader.parse(in_string, root);
        if(!parsingSuccessful)
        {
            std::cout << "Failed to parse JSON: " << reader.getFormattedErrorMessages() << std::endl;
            return false;
        }

        _result = root["result"].asInt();
        _code = root["code"].asInt();
        return true;
    }

    int Result() const {return _result; }
    int Code() const {return _code; }
    void SetResult(int res) {_result = res; }
    void SetCode(int c) {_code = c; }
private:
    int _result;
    int _code; //出错码
};